Effects of the Los Angeles transit strike on highway congestion

In this paper we investigate the effect of the Los Angeles transit strike on highway congestion through analysis of highway sensor data, using both a before-and-after comparison, and a control group comparison. We found that average 5:00 a.m. to 10:00 p.m. traffic speeds declined by as much as 20% during the strike, and the average length of the rush period increased by as much as 200%, even though increases in traffic were small, despite the fact that transit riders constitute a small fraction of the traveling population. Speeds declined the most at locations upstream from the places where queues normally end. We believe that highways are especially susceptible to congestion during strikes because travelers have little opportunity to adjust and equilibrate their travel patterns, as is possible during ordinary periods of traffic growth.     

桂闽两省区高速公路隧道电力系统应用对比探悉

文章阐述了广西与福建两省区高速公路隧道供配电系统设计的一些特点，并对两种设计方式的技术应用进行了一系列的对比，分析了各自的优劣，以期为今后隧道供配电方案的应用和选择提供参考。     

夯能和夯击次数在西部山区公路填方路堤中的应用

文章介绍了强夯法在国内外研究和应用的现状,结合强夯在西部山区填方路堤再压实的试验,分析了夯能和夯击次数对填方路堤沉降量的影响,提出了不同夯能条件下夯击次数的具体取值范围,为今后同类工程的设计和施工提供参考。     

西部二级公路水泥稳定碎石基层施工质量控制方法

文章针对西部地区公路水泥稳定碎石施工质量控制问题,结合广西富川麦岭二级公路施工实践,探讨西部地区二级公路水泥稳定碎石基层施工质量控制方法。     

微表处在济青高速公路淄河大桥桥面养护中的应用

结合微表处在济青高速公路淄河大桥桥面上的施工,包括原材料选择、配合比设计、施工控制、质量检测等方面,经过施工通车表明,微表处对桥面的抗滑性、平整度以及行车舒适性都起到了提高和改善作用,为今后高速公路水泥混凝土桥面养护提出一种新的预防技术。     

Estimating percent-time-spent-following on two-lane rural highways

This study concentrated on estimating the percent-time-spent-following (PTSF) on two-lane highways. This measure is a key estimate of level-of-service in traffic engineering applications. Its evaluation to date has been based on simulations that yielded over-estimated values. The present study shows how to estimate this variable from easily obtained field data based on queuing theory. The estimates accord with opinions on yielding significantly lower values of PTSF that are expressed in the relevant traffic literature. An improved relationship between PTSF and two-way flow is provided by fitting the new estimates by means of the least-squares method.